Magnetism Basics

Magnetism Basics

By Leslie Dunham

Multiple Choice

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

Multiple Choice

What happens if you cut a bar magnet in half?

• You get two North pole magnets
• You get two South pole magnets
• You get a North pole magnet and a South pole magnet
• You get two smaller magnets, each with a North and South pole

Multiple Choice

A magnet will pick up a nail, but not a penny because the nail

• has rust on it.

• is lighter than the penny.

• has a sharp point.

• contains iron.

Multiple Choice

If two magnets push away from each other (repel), they must

• have like poles facing each other

• have opposite poles facing each other

• really not like each other

Multiple Choice

You know this substance is magnetized because

• all the domains have right angles
• the arrows are drawn in red
• the domains are aligned
• the domains are random

Multiple Choice

Permanent magnets are made out of which materials?

• Cobalt, Nickel, and Iron

• Copper, Chromium, and Cobalt

• Gold, Silver, and Platinum

• Copper, Nickel, and Iron

Multiple Choice

What's one way to demagnetize a magnet quicker?

• Strike it with a hammer

• Move it into a magnetic field

• Rub the opposite magnetic pole onto it

• Break the magnet in half

Multiple Choice

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Multiple Choice

What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.
• Inserting a wooden core inside the coil
• Changing the direction of the current
• Decreasing the number of coils of wire

Multiple Choice

What is the name of a magnet that stays magnetic only while it touches a permanent magnet, or one that is magnetic for a very short time?

• Temporary magnet

• Semi-Permanant magnet

• Electromagnet

• Natural Magnet